Ul 181 Class 1 Air

STANDARD SPECIFICATIONS for CONSTRUCTION and …

Aug 21, 2003 · 201 ROADWAY EXCAVATION (CLASS 1, CLASS 1-A, CLASS 2) 202 CHANNEL OR STREAM CHANGE EXCAVATION (CLASS 5) 166 171 . ... 181 182 CATEGORY 300 - DRAINAGE 184 ... UL Underwriters Laboratories, Incorporated QPL Qualified Products List

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USG Securock® Brand UltraLight Glass-Mat Sheathing ...

• Underwriters Laboratories Inc. (UL) Classification of 1/2 in. (12.7 mm) panels as to surface burning characteristics and noncombustibility • UL Classification of 5/8 in. (15.9 mm) panels as to fire resistance, surface burning characteristics and noncombustibility

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A GUIDE TO INSULATED HVAC DUCT SYSTEMS

products qualify under UL 181 as Class 1 Air Ducts, meeting the fire safety requirements of NFPA 90A and 90B including limited combustibility. They also comply with all widely used model codes. Duct board joint closures are sealed using one of three UL 181A listed systems.

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Flexible Duct Performance & Installation Standards

UL Standard 181 - Factory-Made Air Ducts and Air Connectors UL Standard 181B - Closure Systems for Use With Flexible Air Ducts and Air Connectors ... gory, style, class and type manufactured under essen-tially the same conditions and from which a sample is to be drawn and inspected for conformance to specifi-cation.

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MCWANE DUCTILE IRON PIPE

are NSF 61 approved, UL listed, and FM approved. FM Rating: 4 in. – 6 in. = 250 psi 18 in. –24 in. = 200 psi mcwaneductile.com Pipe Size In. Min. Pipe Diameter In. Max. Pipe Diameter In. Min. Pipe Circumference In. Max. Pipe Circumference In. 3 3.9 4.02 12-1/4 12-5/8 4 4.74 4.86 14-29/32 15-9/32 6 6.84 6.96 21-1/2 21-7/8 8 8.99 9.11 28-1/4 ...